I have been trying to get information on how to sort this problem on the net but none were relevant. My problem is that i got 3 hds and the one that im using(mac) is full. The other is windows installed somehow, not me who installed it though. So i went to bootcamp assistant to try fuse them back together and I get this error message. It says the startup disk cannot be partitioned or restored to a single partition as it must be formmated as Mac OS Extended ( journaled ) or already partitioned by bootcamp for installing windows. Is there a way without the original start disc because I cant find it! Ty for all answers!